2006 Tahoe MPG gauge question

Since the last reset

Idle is the last thing it sees, idle is zero miles per gallon

Do you think the fact the Tahoe weighs about three times as much as the Saab might have anything at all to do with that?

Dont get me wrong here, I drove one of the very first Sabb 900 Turbos, with an intercooler back in the mid 70's while stationed in Germany, damn thing was fast. Also ugly as sin, and the electrical systems, back then at least all the way through the mid 90's(last i worked on one) were night mares.

Reset of what? The tripmeter?

Agreed...but this isn't a consistent thing. And that thing doesn't react too quickly. Nowhere near as quick as those numbers are changing.

LOL... Well, not really. I've driven equally heavy vehicles that handled cruise control with a lot more finesse. There also seems to be a delayed reaction when you turn it on. Worse, you can feel it "engage" while setting it. In the Saab, you hit the button, and you don't realize anything happened--until you remove your foot from the gas and the car doesn't lose speed.

The turbo sure does make it a lot more fun, doesn't it?? :-)

I've only owned mine for about 2 months now (9-3 convertible, turbo,

5sp) but I'm loving it.

~jp

I am trying to remember how I reset the MPG in the last rental car I had, a Ponitac Grand Prix. It should be in the owners manual though. The range resets every time you fil the tank up, based on fuel mileage. so if the vehicle was driven hard during the last fuel up, the range will be less than if its driven easy, but that updates as well based on mpg. I found the readings were pretty close during the week I had the Grand Prix. Doesnt sound like very long, but I average 43,000 miles a year.

I have found in the past when the rule was no replacement for displacement, the cruise was smoother on all vehicles. They may advertise 200 hp (just using numbers here) from these smaller displacment engines, but my seat of the pants tells me its not the same as the 200 hp I was used to feeling in larger engines, coupled I think with the fact the torque band isnt as wide, and not nearly as flat, meaning a big time curve in the center. I do think the the cruise system will drop a tranny gear too soon sometimes, but I also think thats because its trying to keep the engine from lugging. At 70mph that GP was loping at just over 1600 rpm, it didnt take much of a grade to cause it to drop and then it kicked down and rpm jumped to about 2,000 if it just unlocked the torque converter, 2,300 if it droped all the way to drive.

Imagine being a teen stationed in Germany on the autobans back when they didnt have a speed limits except in cities. : )

Whitelightning

After getting really frustrated I sat in the parking deck after work for 10 minutes and found it... You can reset it directly by hitting the bottom-right "arrow" button on the steering wheel. Simple enough, but not very clearly marked. I didn't find it in the manual, although I'm sure it must be in there. As soon as you reset it, it "zeroes" out and starts tallying MPG from that point on--same as my Saab.

Well, the Tahoe doesn't drop a gear unless it tries to go up a hill, then it guns it and downshifts. I futzed with the cruise again on the way home to make sure I wasn't imagining anything. While holding a steady 55mph on level ground, I engaged it. It pulled the pedal out from underneath the foot and surged for a split second, then took over. Annoying...but then again, it's not my truck, and the woman thinks it's just great, and as long as she likes it, cool... In the meantime I await the return of my Saab, as the dealer couldn't fool with it today.

Damn, I wish my K5 was in town (and had a good rear axle) :-(

Heh...now that's my idea of fun.

~jp

Hi!

Hmmm...that's a good question. If you have one, does the manual say anything about it?

I'd hazard a guess that the meter on your Tahoe resets when the tripometer gets reset. But I couldn't prove that.

As for the "jumpiness" in the reading, this could be a multitude of factors. Most likely is that the control program simply isn't well optimized or it has a bug. Perhaps the computer doing this work is busy with other things and doesn't sample the data often enough to arrive at a quicker or more accurate result. It might also not have enough memory to store enough data for an accurate result. Finally, there is the possibility of the thing just needing a good reset. It's probably powered whenever the battery is connected. If the battery has been hooked up a long time, you may have found a "time delay bug" in the program.

In the case of a control program problem, there is at least some hope that GM might issue an update that you could ask for. For a busy computer or lack of memory, there's probably not much can be done.

I've noticed that "floor it" behavior (especially with hills) on older GM vehicles with cruise controls. I've also noticed that GM's cruise controls tend to "drift" up or down a few MPH depending upon the direction you're running. Pulling a hill may result in a few MPH drop while going down one results in the speed going up a bit.

They seem to have fixed the "floor it" problem in at least one vehicle. My

2003 S-10 (V6, extended cab, 2WD) just won't do this. That takes all the fun out of kicking on the cruise at a lower rate of speed when it is set to much higher speed. :-) No matter what, unless it is pulling a really good steep hill, it "stops" at 2,000 RPM when accelerating with the cruise enabled.

As far as the smoothness goes, I like the feeling of a brief "dead spot" or "notch" followed by acceleration when the cruise is set or resumed. Being as my S-truck has no cruise indicator light, it lets me know that the setting has indeed taken effect.

William